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Borggaard XG, Roux JP, Delaisse JM, Chavassieux P, Andreasen CM, Andersen TL. Alendronate prolongs the reversal-resorption phase in human cortical bone remodeling. Bone 2022; 160:116419. [PMID: 35413490 DOI: 10.1016/j.bone.2022.116419] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 04/02/2022] [Accepted: 04/07/2022] [Indexed: 01/18/2023]
Abstract
Despite their ability to reduce fracture-risk and increase Bone Mineral Density (BMD) in osteoporotic women, bisphosphonates are reported to reduce formation of new bone. Reduced bone formation has been suggested to lead to accumulation of microfractures and contribute to rare side effects in cortical bone such as atypical femur fractures. However, most studies are limited to trabecular bone. In this study, the cortical bone remodeling in human iliac bone specimens of 65 non-treated and 24 alendronate-treated osteoporotic women was investigated using a new histomorphometric classification of intracortical pores. The study showed that only 12.4 ± 11% of the cortical pore area reflected quiescent pores/osteons in alendronate-treated patients versus 8.5 ± 5% in placebo, highlighting that new cortical remodeling events remain to be activated. The percent and size of eroded pores (events in resorption-reversal phase) remained unchanged, but their contribution to total pore area was 1.4-fold higher in alendronate versus placebo treated patients (66 ± 22% vs 48 ± 22%, p < 0.001). On the other hand, the mixed eroded-formative pores (events with mixed resorption-reversal-formation phases) was 2-fold lower in alendronate versus placebo treated patients (19 ± 14% vs 39 ± 23% of total pore area, p < 0.001), and formative pores (event in formation phase) was 2.2-fold lower in alendronate versus placebo treated patients (2.1 ± 2.4% vs 4.6 ± 3.6%, p < 0.01), and their contribution to total pore area was 2.4-fold lower (1.3 ± 2.1% vs 3.1 ± 4.4%, p < 0.05). Importantly, these differences between alendronate and placebo treated patients were significant in patients after 3 years of treatment, not after 2 years of treatment. Collectively, the results support that cortical remodeling events activated during alendronate treatment has a prolonged reversal-resorption phase with a delayed transition to formation, becoming increasingly evident after 3-years of treatment. A potential contributor to atypical femur fractures associated with long-term bisphosphonate treatment.
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Affiliation(s)
- Xenia G Borggaard
- Molecular Bone Histology Team, Clinical Cell Biology, Research Unit of Pathology, Dept. of Clinical Research and Dept. of Molecular Medicine, University of Southern Denmark, Odense, Denmark; Dept. of Pathology, Odense University Hospital, Odense, Denmark.
| | | | - Jean-Marie Delaisse
- Molecular Bone Histology Team, Clinical Cell Biology, Research Unit of Pathology, Dept. of Clinical Research and Dept. of Molecular Medicine, University of Southern Denmark, Odense, Denmark; Dept. of Pathology, Odense University Hospital, Odense, Denmark
| | | | - Christina M Andreasen
- Molecular Bone Histology Team, Clinical Cell Biology, Research Unit of Pathology, Dept. of Clinical Research and Dept. of Molecular Medicine, University of Southern Denmark, Odense, Denmark; Dept. of Pathology, Odense University Hospital, Odense, Denmark
| | - Thomas L Andersen
- Molecular Bone Histology Team, Clinical Cell Biology, Research Unit of Pathology, Dept. of Clinical Research and Dept. of Molecular Medicine, University of Southern Denmark, Odense, Denmark; Dept. of Pathology, Odense University Hospital, Odense, Denmark; Dept. of Forensic Medicine, Aarhus University, Aarhus, Denmark.
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Ozden FO, Demir E, Lutfioglu M, Acarel EE, Bilgici B, Atmaca A. Effects of periodontal and bisphosphonate treatment on the gingival crevicular levels of sclerostin and dickkopf-1 in postmenopausal osteoporosis with and without periodontitis. J Periodontal Res 2022; 57:849-858. [PMID: 35665506 DOI: 10.1111/jre.13023] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 05/12/2022] [Accepted: 05/25/2022] [Indexed: 11/27/2022]
Abstract
OBJECTIVE AND BACKGROUND Both periodontitis and osteoporosis are associated with osteoclast-related bone resorption. Bone metabolism is regulated by wingless-type MMTV integration site family (WNT), and WNT/β-catenin signals are controlled by physiological antagonists including dickkopf-1 (DKK-1) and sclerostin (SOST). This study examined the effects of periodontal and bisphosphonate (BP) treatment on the gingival crevicular fluid (GCF) sclerostin (SOST) and dickkopf-related protein-1 (DKK-1) levels in osteoporotic and systemically healthy postmenopausal women with and without periodontitis. MATERIALS AND METHODS A total of 48 postmenopausal women were divided into 4 groups (n = 12) according to periodontal health and osteoporosis status, as follows: Group OP/P: subjects with both osteoporosis and periodontitis; Group P: systemically healthy subjects with periodontitis; Group OP: periodontally healthy subjects with osteoporosis; Group H: systemically and periodontally healthy controls. Clinical data and GCF SOST and DKK-1 levels of the participants were collected at baseline and at 6 and 12 months following the initiation of periodontal and/or BP treatment in the experimental groups. GCF SOST and DKK-1 data were obtained by ELISA. RESULTS Clinical improvements were observed in all experimental groups. GCF SOST and DKK1 baseline levels varied significantly between groups due to periodontal disease (p < .001). Following treatment, significant increases in SOST and DKK-1 concentrations and significant decreases in total amounts of SOST were observed in both periodontitis groups (OP/P, P). However, while total amounts of DKK-1 decreased in Group OP/P, in Group P, these amounts had significantly increased at 12 months post-treatment (p < .05). At both 6 and 12 months post-treatment, SOST and DDK1 total amounts in Groups OP/P, OP, and H were similar (p > .05), whereas significant differences were observed between Groups H and P, indicating a deviation from periodontal health in Group P (p < .01). CONCLUSIONS Significant changes in GCF SOST and DKK-1 levels were observed among women with osteoporosis who received both periodontal and BP treatment. A more detailed examination of how these treatment protocols can be combined may lead to new therapeutic approaches towards periodontal disease.
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Affiliation(s)
- Feyza Otan Ozden
- Department of Periodontology, Faculty of Dentistry, Ondokuz Mayıs University, Samsun, Turkey
| | - Esra Demir
- Department of Periodontology, Faculty of Dentistry, Bezmialem Vakıf University, İstanbul, Turkey
| | - Müge Lutfioglu
- Department of Periodontology, Faculty of Dentistry, Ondokuz Mayıs University, Samsun, Turkey
| | - Elif Eser Acarel
- Department of Periodontology, Faculty of Dentistry, Ondokuz Mayıs University, Samsun, Turkey
| | - Birsen Bilgici
- Department of Biochemistry, Faculty of Medicine, Ondokuz Mayıs University, Samsun, Turkey
| | - Aysegül Atmaca
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Faculty of Medicine, Ondokuz Mayis University, Samsun, Turkey
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Kuroda T, Shiraki M, Nakamura T, Suzuki H, Hiraishi K, Sugimoto T, Tanaka S. Relationship Between Changes in Serum Levels of Intact Parathyroid Hormone and Sclerostin After a Single Dose of Zoledronic Acid: Results of a Phase 1 Pharmacokinetic Study. Calcif Tissue Int 2022; 110:87-92. [PMID: 34427705 PMCID: PMC8732852 DOI: 10.1007/s00223-021-00900-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 07/30/2021] [Indexed: 11/04/2022]
Abstract
Although changes in serum sclerostin levels at 12 months after infusion of zoledronic acid have been reported, the changes in sclerostin levels at earlier time points are poorly understood. We reanalyzed the study data of a previous phase 1 pharmacokinetic study and investigated the correlation between changes in sclerostin levels and relevant factors in calcium metabolism. A total of 24 Japanese female subjects with primary postmenopausal osteoporosis were administered a single 4- or 5-mg dose of zoledronic acid. Serum and urine samples were collected on days 15, 29, 90, 180, and 365 after administration. Serum levels of calcium, phosphate, intact parathyroid hormone (iPTH), and sclerostin were measured. Levels of serum sclerostin were unchanged from baseline on days 15 and 29, but increased significantly on day 90, subsequently decreased significantly on day 180, and returned to baseline levels on day 365. A significant negative correlation was observed between changes in iPTH levels at early time points and sclerostin levels at later time points. This suggests that sclerostin was negatively regulated by iPTH, and the decrease in sclerostin may indicate the start of bone formation during later time points after zoledronic acid injection.
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Affiliation(s)
- Tatsuhiko Kuroda
- Healthcare R&D Center, Asahi Kasei Corporation, 1-1-2 Yurakucho, Chiyoda-ku, Tokyo, 100-0006, Japan
| | - Masataka Shiraki
- Research Institute and Practice for Involutional Diseases, 1610-1 Meisei, Misato, Azumino, Nagano, 399-8101, Japan
| | - Toshitaka Nakamura
- Touto Sangenjaya Rehabilitation Hospital, 1-24-3 Sangenjaya, Setagaya-ku, Tokyo, 154-0024, Japan
| | - Hiroaki Suzuki
- Medical Affairs Department, Asahi Kasei Pharma Corporation, 1-1-2 Yurakucho, Chiyoda-ku, Tokyo, 100-0006, Japan
| | - Kazuki Hiraishi
- Medical Affairs Department, Asahi Kasei Pharma Corporation, 1-1-2 Yurakucho, Chiyoda-ku, Tokyo, 100-0006, Japan
| | - Toshitsugu Sugimoto
- Internal Medicine 1, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo, Shimane, 693-8501, Japan
| | - Satoshi Tanaka
- Development Planning, Clinical Development Center, Asahi Kasei Pharma Corporation, 1-1-2 Yurakucho, Chiyoda-ku, Tokyo, 100-0006, Japan.
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Pharmacodynamics of Oral Cholecalciferol in Healthy Individuals with Vitamin D Deficiency: A Randomized Open-Label Study. Nutrients 2021; 13:nu13072293. [PMID: 34371803 PMCID: PMC8308331 DOI: 10.3390/nu13072293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 06/28/2021] [Accepted: 06/30/2021] [Indexed: 11/16/2022] Open
Abstract
Comparative pharmacodynamic (PD) analyses on different dosing schedules for cholecalciferol supplementation are limited. This was an open-label, randomized, parallel-group study involving 75 healthy individuals deficient in vitamin D (baseline 25OHD < 20 ng/mL) receiving oral cholecalciferol with three different dosing regimens: Group A: 10,000 IU/day for 8 weeks followed by 1000 IU/day for 4 weeks; Group B: 50,000 IU/week for 12 weeks and Group C: 100,000 IU every other week for 12 weeks. Regulators of calcium and phosphate homeostasis, bone turnover markers and Wnt inhibitors were measured at baseline, Day 28, 53, 84, and 112. The 1,25OH2D increased at each time point. The increase was greater (p < 0.05) for group A vs. B and C at Day 28, and vs. group B at Day 56. No significant difference among groups was observed for the other biomarkers. The 24,25OH2D remained stable over time. PTH decreased at Day 84 and FGF-23 increased at all time points. CTX-I and PINP increased slightly at Day 28. BALP decreased from Day 56 onward. Dkk-1 increased from Day 56 onward, while sclerostin did not show significant changes. In healthy individuals deficient in vitamin D, vitamin D supplementation exerted effects on multiple regulators of calcium, phosphate and bone metabolism, without marked differences using the three regimens.
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Anastasilakis AD, Polyzos SA, Yavropoulou MP, Ntenti C, Mandanas S, Makras P. Circulating sclerostin levels during denosumab discontinuation and the subsequent early or late zoledronate infusion. Endocrine 2021; 73:223-225. [PMID: 33651343 DOI: 10.1007/s12020-021-02666-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 02/17/2021] [Indexed: 11/28/2022]
Affiliation(s)
| | - Stergios A Polyzos
- First Laboratory of Pharmacology, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Maria P Yavropoulou
- Endocrinology Unit, 1st Department of Propaedeutic and Internal Medicine, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Charikleia Ntenti
- First Laboratory of Pharmacology, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Stylianos Mandanas
- Department of Endocrinology, 424 General Military Hospital, Thessaloniki, Greece
| | - Polyzois Makras
- Department of Endocrinology and Diabetes and Department of Medical Research, 251 Hellenic Air Force & VA General Hospital, Athens, Greece
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Shatunova EA, Korolev MA, Omelchenko VO, Kurochkina YD, Davydova AS, Venyaminova AG, Vorobyeva MA. Aptamers for Proteins Associated with Rheumatic Diseases: Progress, Challenges, and Prospects of Diagnostic and Therapeutic Applications. Biomedicines 2020; 8:biomedicines8110527. [PMID: 33266394 PMCID: PMC7700471 DOI: 10.3390/biomedicines8110527] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 11/18/2020] [Accepted: 11/20/2020] [Indexed: 02/07/2023] Open
Abstract
Nucleic acid aptamers capable of affine and specific binding to their molecular targets have now established themselves as a very promising alternative to monoclonal antibodies for diagnostic and therapeutic applications. Although the main focus in aptamers’ research and development for biomedicine is made on cardiovascular, infectious, and malignant diseases, the use of aptamers as therapeutic or diagnostic tools in the context of rheumatic diseases is no less important. In this review, we consider the main features of aptamers that make them valuable molecular tools for rheumatologists, and summarize the studies on the selection and application of aptamers for protein biomarkers associated with rheumatic diseases. We discuss the progress in the development of aptamer-based diagnostic assays and targeted therapeutics for rheumatic disorders, future prospects in the field, and issues that have yet to be addressed.
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Affiliation(s)
- Elizaveta A. Shatunova
- Institute of Chemical Biology and Fundamental Medicine, Siberian Division of Russian Academy of Sciences, 630090 Novosibirsk, Russia; (E.A.S.); (A.S.D.); (A.G.V.)
| | - Maksim A. Korolev
- Research Institute of Clinical and Experimental Lymphology, Affiliated Branch of Federal Research Center of Cytology and Genetics, Siberian Division of the Russian Academy of Sciences, 630060 Novosibirsk, Russia; (M.A.K.); (V.O.O.); (Y.D.K.)
| | - Vitaly O. Omelchenko
- Research Institute of Clinical and Experimental Lymphology, Affiliated Branch of Federal Research Center of Cytology and Genetics, Siberian Division of the Russian Academy of Sciences, 630060 Novosibirsk, Russia; (M.A.K.); (V.O.O.); (Y.D.K.)
| | - Yuliya D. Kurochkina
- Research Institute of Clinical and Experimental Lymphology, Affiliated Branch of Federal Research Center of Cytology and Genetics, Siberian Division of the Russian Academy of Sciences, 630060 Novosibirsk, Russia; (M.A.K.); (V.O.O.); (Y.D.K.)
| | - Anna S. Davydova
- Institute of Chemical Biology and Fundamental Medicine, Siberian Division of Russian Academy of Sciences, 630090 Novosibirsk, Russia; (E.A.S.); (A.S.D.); (A.G.V.)
| | - Alya G. Venyaminova
- Institute of Chemical Biology and Fundamental Medicine, Siberian Division of Russian Academy of Sciences, 630090 Novosibirsk, Russia; (E.A.S.); (A.S.D.); (A.G.V.)
| | - Mariya A. Vorobyeva
- Institute of Chemical Biology and Fundamental Medicine, Siberian Division of Russian Academy of Sciences, 630090 Novosibirsk, Russia; (E.A.S.); (A.S.D.); (A.G.V.)
- Correspondence:
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Fassio A, Adami G, Benini C, Vantaggiato E, Saag KG, Giollo A, Lippolis I, Viapiana O, Idolazzi L, Orsolini G, Rossini M, Gatti D. Changes in Dkk-1, sclerostin, and RANKL serum levels following discontinuation of long-term denosumab treatment in postmenopausal women. Bone 2019; 123:191-195. [PMID: 30910600 DOI: 10.1016/j.bone.2019.03.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 03/12/2019] [Accepted: 03/16/2019] [Indexed: 02/01/2023]
Abstract
PURPOSE The positive effects of denosumab (DMAb) on bone mineral density (BMD) are quickly reversible after its discontinuation. We investigated whether this rebound was associated with dysregulation of the Wnt canonical pathway and/or by the increase in the receptor-activator of nuclear factor-kappa B ligand (RANKL) serum levels. METHODS The study included patients (n = 15) with postmenopausal osteoporosis to whom DMAb was administered for 78 months and then discontinued. We collected BMD data at baseline/month 0 (M0), M60, M84 (6 months after last DMAb administration, coinciding when the next DMAb dose would typically be due), and after 3 and 12 months of follow-up (FU-M3 and FU-M12, respectively). Serum C-terminal telopeptide of type 1 collagen (CTX-I), Dickkopf-1 (Dkk-1), and sclerostin were measured at M0, M60, M84, FU-M3, and FU-M12. Serum N-terminal propeptide of type 1 procollagen (PINP) and RANKL were dosed at M60, M84, FU-M3, and FU-12. RESULTS We found a significant decrease in the T-score at all sites at FU-M12, when compared to M84 (-0.51 ± 0.91 at the lumbar spine; -0.72 ± 0.33 at the total hip; and -0.42 ± 0.27 at the femoral neck, p < 0.05). After DMAb discontinuation (M84 vs FU M12) CTX-I, PINP increased already at FU-M3 (+0.921 ± 0.482 ng/mL, +126.60 ± 30.36 ng/mL, respectively, p < 0.01), RANKL increased at FU-M12 (+0.041 ± 0.062 ng/mL, p < 0.05), while Dkk-1 and sclerostin decreased at FU-M12 (-10.90 ± 11.80 and - 13.00 ± 10.52 pmol/L, respectively, p < 0.01). No changes in BMD or any of the markers were found between M60 and M84. CONCLUSIONS RANKL serum levels progressively increased after discontinuation of long-term DMAb while Dkk-1 and sclerostin serum levels decreased. The increase in RANKL serum levels supports the hypothesis of a sudden loss of inhibition of the resting osteoclast line after DMAb clearance, with a hyperactivation of these cells. Our results suggest that the changes in serum Wnt inhibitors after DMAb suspension might represent a mere feedback response to the increased bone turnover.
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Affiliation(s)
- A Fassio
- Rheumatology Unit, University of Verona, Piazzale A. Scuro, 10, 37134 Verona, Italy.
| | - G Adami
- Rheumatology Unit, University of Verona, Piazzale A. Scuro, 10, 37134 Verona, Italy; Division of Clinical Immunology and Rheumatology, University of Alabama at Birmingham, 510 20th Street South, Faculty Office Tower 820D, Birmingham, AL 35294, USA
| | - C Benini
- Rheumatology Unit, University of Verona, Piazzale A. Scuro, 10, 37134 Verona, Italy
| | - E Vantaggiato
- Rheumatology Unit, University of Verona, Piazzale A. Scuro, 10, 37134 Verona, Italy
| | - K G Saag
- Division of Clinical Immunology and Rheumatology, University of Alabama at Birmingham, 510 20th Street South, Faculty Office Tower 820D, Birmingham, AL 35294, USA
| | - A Giollo
- Rheumatology Unit, University of Verona, Piazzale A. Scuro, 10, 37134 Verona, Italy
| | - I Lippolis
- Rheumatology Unit, University of Verona, Piazzale A. Scuro, 10, 37134 Verona, Italy
| | - O Viapiana
- Rheumatology Unit, University of Verona, Piazzale A. Scuro, 10, 37134 Verona, Italy
| | - L Idolazzi
- Rheumatology Unit, University of Verona, Piazzale A. Scuro, 10, 37134 Verona, Italy
| | - G Orsolini
- Rheumatology Unit, University of Verona, Piazzale A. Scuro, 10, 37134 Verona, Italy
| | - M Rossini
- Rheumatology Unit, University of Verona, Piazzale A. Scuro, 10, 37134 Verona, Italy
| | - D Gatti
- Rheumatology Unit, University of Verona, Piazzale A. Scuro, 10, 37134 Verona, Italy
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Tsourdi E, Makras P, Rachner TD, Polyzos S, Rauner M, Mandanas S, Hofbauer LC, Anastasilakis AD. Denosumab effects on bone density and turnover in postmenopausal women with low bone mass with or without previous treatment. Bone 2019; 120:44-49. [PMID: 30292818 DOI: 10.1016/j.bone.2018.10.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 09/29/2018] [Accepted: 10/03/2018] [Indexed: 02/06/2023]
Abstract
PURPOSE Prior osteoporosis therapies may affect the skeletal response to denosumab. We compared the effect of denosumab (60 mg every 6 months for 12 months) on bone mineral density and bone metabolism parameters in postmenopausal women with low bone mass who were either treatment-naïve (n = 30), or previously treated either with zoledronic acid (n = 30), or teriparatide (n = 22). METHODS We assessed lumbar spine bone mineral density (BMD) and measured serum concentrations of the bone turnover markers pro-collagen type 1 N-terminal propeptide (PINP) and C-terminal-cross-linking telopeptide of type 1 collagen (CTX), as well as sclerostin, dickkopf-1 (Dkk-1), and myostatin. RESULTS Lumbar spine BMD increased equivalently in all three groups after 12 months of denosumab compared to baseline (p < 0.001). Serum PINP and CTX decreased significantly with denosumab in pre-treated women reaching the same nadir levels as in treatment-naïve patients (p < 0.001). Women pre-treated with teriparatide displayed lower baseline myostatin concentrations as compared to the other two groups (p < 0.001). Changes in lumbar spine BMD in teriparatide pre-treated women correlated with changes in bone turnover markers and myostatin. CONCLUSIONS Denosumab induced similar increases in lumbar spine BMD in treatment-naïve and pre-treated patients and suppressed serum PINP and CTX to the same levels regardless of prior treatments. In teriparatide pre-treated patients the magnitude of change in bone turnover markers is associated with BMD response.
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Affiliation(s)
- Elena Tsourdi
- Department of Medicine III, Technische Universität Dresden Medical Center, Dresden, Germany; Center for Healthy Aging, Technische Universität Dresden Medical Center, Dresden, Germany
| | - Polyzois Makras
- Department of Endocrinology and Diabetes, 251 Hellenic Force & VA General Hospital, Athens, Greece
| | - Tilman D Rachner
- Department of Medicine III, Technische Universität Dresden Medical Center, Dresden, Germany; Center for Healthy Aging, Technische Universität Dresden Medical Center, Dresden, Germany
| | - Stergios Polyzos
- First Department of Pharmacology, Medical School, Aristotle University of Thessaloniki, Greece
| | - Martina Rauner
- Department of Medicine III, Technische Universität Dresden Medical Center, Dresden, Germany; Center for Healthy Aging, Technische Universität Dresden Medical Center, Dresden, Germany
| | - Stylianos Mandanas
- Department of Endocrinology, 424 General Military Hospital, 54638 Thessaloniki, Greece
| | - Lorenz C Hofbauer
- Department of Medicine III, Technische Universität Dresden Medical Center, Dresden, Germany; Center for Healthy Aging, Technische Universität Dresden Medical Center, Dresden, Germany; Center for Regenerative Therapies Dresden, Technische Universität Dresden, Germany
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Microglial Depletion with Clodronate Liposomes Increases Proinflammatory Cytokine Levels, Induces Astrocyte Activation, and Damages Blood Vessel Integrity. Mol Neurobiol 2019; 56:6184-6196. [PMID: 30734229 DOI: 10.1007/s12035-019-1502-9] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Accepted: 01/18/2019] [Indexed: 01/22/2023]
Abstract
Investigators are increasingly interested in using microglial depletion to study the role of microglia under pathologic conditions. Liposome-encapsulated clodronate is commonly used to eliminate macrophage populations because it causes functionally irreversible inhibition and apoptosis once phagocytized by macrophages. Recent studies have shown that microglia can be depleted in disease models by injecting clodronate liposomes into the brain parenchyma. However, it is unclear whether intracerebral administration of clodronate liposomes is a practical method of eliminating microglia under physiologic conditions or whether microglial depletion induces damage to other brain cells. In this study, injecting 1 μL of clodronate liposomes (7 μg/μL) into the striatum of mice caused ablation of microglia at 1 day that persisted for 3 days. Microglia reappeared in the boundary regions of microglia elimination after 5 days. Importantly, we observed an increase in proinflammatory cytokine levels and an increase in neural/glial antigen 2 and glial fibrillary acidic protein expression in the perilesional region. In contrast, expression levels of myelin basic protein, microtubule-associated protein 2, and postsynaptic protein-95 decreased in the periphery of regions where microglia were depleted. Moreover, clodronate liposome administration decreased the density and integrity of blood vessels in the perilesional regions. In cultured primary neurons, clodronate liposome exposure also attenuated ATP synthesis. Together, these findings suggest that intracerebral administration of clodronate liposomes into brain parenchyma can deplete microglia, but can also damage other brain cells and blood vessel integrity.
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Ma Y, Zhang X, Wang M, Xia Q, Yang J, Wu M, Han R, Chen M, Hu X, Yuan Y, Liu R, Jiang G, Pan G, Zou Y, Xu S, Pan F. The serum level of Dickkopf-1 in patients with rheumatoid arthritis: A systematic review and meta-analysis. Int Immunopharmacol 2018; 59:227-232. [PMID: 29665496 DOI: 10.1016/j.intimp.2018.04.019] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 04/10/2018] [Accepted: 04/10/2018] [Indexed: 12/17/2022]
Abstract
OBJECTIVE Dickkopf-1 (DKK-1) is an endogenous inhibitor of canonical Wnt pathway that was implicated in the pathogenesis of rheumatoid arthritis (RA), but the serum levels of DKK-1 in RA were inconsistent among studies. Therefore, we conducted a meta-analysis to systematically evaluate the relationship between serum DKK-1 levels and RA. METHODS PubMed, Web of Science and Cochrane Library were comprehensively retrieved till 1 January 2018 for pertinent studies. The pooled standard mean differences (SMDs) of serum DKK-1 levels were calculated according to the random effects model. RESULTS Nine original studies containing 1305 RA patients and 504 healthy controls were included in the meta-analysis. The pooled SMD of serum DKK-1 between RA patients and healthy controls was 0.79 (95% CI = 0.11 to 1.48, Z = 2.28 and P = 0.023), indicating a significantly higher serum level of DKK-1 in RA patients. CONCLUSION Serum level of DKK-1 is elevated in patients with RA compared to healthy controls, suggesting an important role of DKK-1 in the pathogenesis and treatment of RA.
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Affiliation(s)
- Yubo Ma
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China; The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China
| | - Xu Zhang
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China; The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China
| | - Mengmeng Wang
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China; The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China
| | - Qing Xia
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China; The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China
| | - Jiajia Yang
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China; The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China
| | - Meng Wu
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China; The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China
| | - Renfang Han
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China; The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China
| | - Mengya Chen
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China; The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China
| | - Xingxing Hu
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China; The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China
| | - Yaping Yuan
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China; The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China
| | - Rui Liu
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China; The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China
| | - Guangming Jiang
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China; The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China
| | - Guixia Pan
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China; The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China
| | - Yanfeng Zou
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China; The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China
| | - Shengqian Xu
- Department of Rheumatism and Immunity, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230032, China
| | - Faming Pan
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China; The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China.
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11
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Wang J, Wang G, Gong L, Sun G, Shi B, Bao H, Duan Y. Isopsoralen regulates PPAR‑γ/WNT to inhibit oxidative stress in osteoporosis. Mol Med Rep 2017; 17:1125-1131. [PMID: 29115612 DOI: 10.3892/mmr.2017.7954] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2016] [Accepted: 06/26/2017] [Indexed: 11/06/2022] Open
Abstract
The present study aimed to examine the effects of isopsoralen against postmenopausal osteoporosis in an ovariectomized rat model. The ovariectomized rats were treated with three days 10 mg/kg isopsoralen or with three days 20 mg/kg isopsoralen. Alkaline phosphatase, the oxidative stress indicators and caspase‑3/9 were measured using ELISA assay kits. Reverse transcription‑quantitative polymerase chain reaction was used to measure collagen type I (Col I), osteocalcin and osteoprotegerin mRNA levels. Wnt, β‑catenin and peroxisome proliferators‑activated receptor γ (PPAR‑γ) were analyzed using western blot analysis. Isopsoralen suppressed mature adipocyte differentiation of C2C12 cells, inhibited serum calcium and urinary calcium levels, and reduced the structural scores of articular cartilage and cancellous bone in the proximal tibia metaphysis of mice with postmenopausal osteoporosis. Isopsoralen also promoted the activity of alkaline phosphatase and the mRNA expression levels of Col 1, osterix and osteopontin in mice with postmenopausal osteoporosis. Oxidative stress and activities of caspase‑3/9 in the mice with postmenopausal osteoporosis were effectively suppressed by isopsoralen treatment, which upregulated the protein expression of Wnt/β‑catenin and downregulated the protein expression of PPAR‑γ. These findings demonstrated that isopsoralen prevented osteoporosis through the regulation of PPAR‑γ/WNT, inhibiting oxidative stress by targeting the PPAR‑γ/WNT pathway. These results provide evidence of the potential targeted therapy for isopsoralen in the clinical treatment of postmenopausal osteoporosis.
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Affiliation(s)
- Jian Wang
- Department of Orthopedics, The Inner Mongolia People's Hospital, Hohhot, Inner Mongolia 010010, P.R. China
| | - Gang Wang
- Department of Orthopedics, Southern Medical University, Guangzhou, Guangdong 510050, P.R. China
| | - Li Gong
- Department of Orthopedics, Southern Medical University, Guangzhou, Guangdong 510050, P.R. China
| | - Guanwen Sun
- Department of Orthopedics, The Inner Mongolia People's Hospital, Hohhot, Inner Mongolia 010010, P.R. China
| | - Bin Shi
- Department of Orthopedics, The Inner Mongolia People's Hospital, Hohhot, Inner Mongolia 010010, P.R. China
| | - Huhe Bao
- Department of Orthopedics, The Inner Mongolia People's Hospital, Hohhot, Inner Mongolia 010010, P.R. China
| | - Yan Duan
- Department of Orthopedics, The Inner Mongolia People's Hospital, Hohhot, Inner Mongolia 010010, P.R. China
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13
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Osteopontin: Relation between Adipose Tissue and Bone Homeostasis. Stem Cells Int 2017; 2017:4045238. [PMID: 28194185 PMCID: PMC5282444 DOI: 10.1155/2017/4045238] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 11/19/2016] [Accepted: 12/18/2016] [Indexed: 12/20/2022] Open
Abstract
Osteopontin (OPN) is a multifunctional protein mainly associated with bone metabolism and remodeling. Besides its physiological functions, OPN is implicated in the pathogenesis of a variety of disease states, such as obesity and osteoporosis. Importantly, during the last decades obesity and osteoporosis have become among the main threats to health worldwide. Because OPN is a protein principally expressed in cells with multifaceted effects on bone morphogenesis and remodeling and because it seems to be one of the most overexpressed genes in the adipose tissue of the obese contributing to osteoporosis, this mini review will highlight recent insights about relation between adipose tissue and bone homeostasis.
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14
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Circulating Dickkopf-1 and sclerostin in patients with Paget’s disease of bone. Clin Rheumatol 2017; 36:925-928. [DOI: 10.1007/s10067-016-3497-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2016] [Revised: 11/22/2016] [Accepted: 11/26/2016] [Indexed: 11/26/2022]
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15
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Guañabens N, Ruiz-Gaspà S, Gifre L, Miquel R, Peris P, Monegal A, Dubrueil M, Arias A, Parés A. Sclerostin Expression in Bile Ducts of Patients With Chronic Cholestasis May Influence the Bone Disease in Primary Biliary Cirrhosis. J Bone Miner Res 2016; 31:1725-33. [PMID: 27019303 DOI: 10.1002/jbmr.2845] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 03/12/2016] [Accepted: 03/23/2016] [Indexed: 02/06/2023]
Abstract
Sclerostin is involved in the regulation of osteoblastogenesis and little is known about its role in the development of bone disease in primary biliary cirrhosis (PBC), characterized by low bone formation. Therefore, we have assessed the circulating levels and the liver expression of sclerostin in this cholestatic disease. Serum sclerostin levels were measured in 79 women with PBC (mean age 60.6 ± 1.2 years) and in 80 control women. Lumbar and femoral bone mineral density (BMD), as well as parameters of mineral metabolism and bone remodeling, were measured. Moreover, sclerostin gene (SOST) expression in the liver was assessed by real-time PCR in samples of liver tissue taken by biopsy in 11 PBC patients and in 5 normal liver specimens. Presence and distribution of sclerostin was evaluated in liver slices from 11 patients by immunohistochemistry. The severity of histologic lesions was assessed semiquantitatively in the same liver samples. PBC patients had higher sclerostin levels than controls (75.6 ± 3.9 versus 31.7 ± 1.6 pmol/L, p < 0.001). Serum sclerostin correlated inversely with markers of bone formation and resorption. Sclerostin mRNA in the liver was overexpressed compared with control samples (2.7-fold versus healthy liver). Sclerostin was detected by immunohistochemistry in 7 of the 11 liver samples, mainly located in the bile ducts. Liver sclerostin was associated with the severity of cholangitis (p = 0.02) and indirectly with the degree of lobular inflammation (p = 0.03). Sclerostin mRNA expression was higher in samples that tested positive by immunohistochemistry and particularly in those with lobular granuloma (p = 0.02). The increased expression of sclerostin in the liver and the association with histologic cholangitis may explain the high serum levels of this protein in patients with PBC, thus suggesting that sclerostin may influence the decreased bone formation in this cholestatic disease. © 2016 American Society for Bone and Mineral Research.
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Affiliation(s)
- Núria Guañabens
- Department of Rheumatology, Metabolic Bone Diseases Unit, Hospital Clínic, Barcelona, IDIBAPS, University of Barcelona, Barcelona, Spain
- Center for Biomedical Research Network in Hepatic and Digestive Diseases (CIBERehd), Hospital Clínic, Barcelona, Spain
| | - Silvia Ruiz-Gaspà
- Center for Biomedical Research Network in Hepatic and Digestive Diseases (CIBERehd), Hospital Clínic, Barcelona, Spain
| | - Laia Gifre
- Department of Rheumatology, Metabolic Bone Diseases Unit, Hospital Clínic, Barcelona, IDIBAPS, University of Barcelona, Barcelona, Spain
| | - Rosa Miquel
- Pathology Department, Hospital Clínic, Barcelona, Spain
| | - Pilar Peris
- Department of Rheumatology, Metabolic Bone Diseases Unit, Hospital Clínic, Barcelona, IDIBAPS, University of Barcelona, Barcelona, Spain
- Center for Biomedical Research Network in Hepatic and Digestive Diseases (CIBERehd), Hospital Clínic, Barcelona, Spain
| | - Ana Monegal
- Department of Rheumatology, Metabolic Bone Diseases Unit, Hospital Clínic, Barcelona, IDIBAPS, University of Barcelona, Barcelona, Spain
| | - Marta Dubrueil
- Center for Biomedical Research Network in Hepatic and Digestive Diseases (CIBERehd), Hospital Clínic, Barcelona, Spain
| | - Ana Arias
- Department of Rheumatology, Metabolic Bone Diseases Unit, Hospital Clínic, Barcelona, IDIBAPS, University of Barcelona, Barcelona, Spain
| | - Albert Parés
- Center for Biomedical Research Network in Hepatic and Digestive Diseases (CIBERehd), Hospital Clínic, Barcelona, Spain
- Liver Unit, Hospital Clínic, Barcelona, IDIBAPS, University of Barcelona, Barcelona, Spain
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16
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Chapurlat RD, Confavreux CB. Novel biological markers of bone: from bone metabolism to bone physiology. Rheumatology (Oxford) 2016; 55:1714-25. [DOI: 10.1093/rheumatology/kev410] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Indexed: 12/14/2022] Open
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17
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Lu H, Li X, Mu P, Qian B, Jiang W, Zeng L. Dickkopf-1 promotes the differentiation and adipocytokines secretion via canonical Wnt signaling pathway in primary cultured human preadipocytes. Obes Res Clin Pract 2015; 10:454-64. [PMID: 26383960 DOI: 10.1016/j.orcp.2015.08.016] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2015] [Revised: 08/24/2015] [Accepted: 08/29/2015] [Indexed: 10/23/2022]
Abstract
OBJECTIVE Dickkopf-1, a newly recognized antagonist for canonical Wnt signaling, is secreted in the early stage of human adipose-derived stem cells (ASCs) adipogenic differentiation. This study was aimed to investigate whether human recombinant DKK-1 (rhDKK-1) could affect the differentiation and metabolism as well as adipocytokines secretion in primary cultured human ASCs. METHODS Human ASCs were isolated from omental adipose tissue and induced to adipogenic differentiation in the absence or presence of Wnt signaling antagonist rhDKK-1 and agonist SB216763, respectively. mRNA and protein expression profiles of adipogenic factors during the differentiation process were analyzed using quantitative RT-PCR and Western blotting. Adipocytokines secretion levels in the culture medium were measured by ELISA method. RESULTS Our results showed that DKK-1 was already expressed during the early stage of adipogenesis and reached the peak on the 9th day. Exogenous rhDKK-1 exposure accelerated the differentiation by up-regulating PPAR-γ and C/EBP-α, down-regulating Wnt3a, Wnt10b and β-catenin, without affecting non-canonical Wnt signaling marker (Wnt5a). In addition, rhDKK-1 treatment increased the secretion of leptin, RBP4, TNF-α and adiponectin during differentiation. rhDKK-1 treatment also significantly increased the intracellular accumulation of lipids and lipolysis. Thus, Wnt signal pathway agonist SB216763 down-regulated DKK-1 transcriptional and secretion levels during adipogenic process. CONCLUSIONS Our results suggest that rhDKK-1 could promote ASCs differentiation and increase adipocytokines secretion via canonical Wnt signaling pathway.
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Affiliation(s)
- Hongyun Lu
- Department of Endocrinology & Metabolism, the Third Affiliated Hospital of Sun Yat-sen University, Guangdong, Guangzhou 510630, China; Department of Endocrinology & Metabolism, the Fifth Affiliated Hospital of Sun Yat-sen University, Guangdong, Zhuhai 519000, China
| | - Xiaofeng Li
- Department of Endocrinology & Metabolism, the Third Affiliated Hospital of Sun Yat-sen University, Guangdong, Guangzhou 510630, China
| | - Panwei Mu
- Department of Endocrinology & Metabolism, the Third Affiliated Hospital of Sun Yat-sen University, Guangdong, Guangzhou 510630, China
| | - Baiying Qian
- Department of Nephrology, the Fifth Affiliated Hospital of Sun Yat-sen University, Guangdong, Zhuhai 519000, China
| | - Wei Jiang
- Department of Endocrinology & Metabolism, the Third Affiliated Hospital of Sun Yat-sen University, Guangdong, Guangzhou 510630, China
| | - Longyi Zeng
- Department of Endocrinology & Metabolism, the Third Affiliated Hospital of Sun Yat-sen University, Guangdong, Guangzhou 510630, China.
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Muschitz C, Kocijan R, Pahr D, Patsch JM, Amrein K, Misof BM, Kaider A, Resch H, Pietschmann P. Ibandronate increases sclerostin levels and bone strength in male patients with idiopathic osteoporosis. Calcif Tissue Int 2015; 96:477-89. [PMID: 25911186 DOI: 10.1007/s00223-015-0003-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Accepted: 04/11/2015] [Indexed: 01/24/2023]
Abstract
The pathomechanism of male idiopathic osteoporosis (MIO) differs from postmenopausal osteoporosis with regard to alterations in osteoblast activity. We evaluated intravenous ibandronate (IBN) in 25 MIO patients with fragility fractures in a prospective, monocentric, single-arm, and open-label study for 24 months. The impact and changes of sclerostin (Scl), Dickkopf-1 (DKK-1), CTX, and PINP were examined. Additionally, volumetric cortical, trabecular and areal bone mineral density (BMD), trabecular bone score (TBS), and finite element analyses (FEA) were evaluated. Compared to baseline, median Scl levels were increased after 1 month (Δ 121%, p < 0.0001) and remained elevated for 12 months. DKK-1 decreased (p < 0.001) to a lesser extent until month 9 with values comparable to baseline at study endpoint. Early changes (baseline-month 1) of Scl negatively correlated with early changes of DKK-1 (-0.72), CTX (-0.82), and PINP (-0.55; p < 0.005 for all). The overall changes over the 24 months study period of Scl negatively correlated with decreased CTX (-0.32) and DKK-1 levels (-0.57, p < 0.0001 for both); CTX and PINP changes positively correlated at each time point (p < 0.001). Volumetric hip BMD increased by 12 and 18%, respectively (p < 0.0001 for both). Cross-sectional moment of inertia and section modulus for total hip significantly improved (p < 0.05 for all). Areal BMD at total hip, spine, and TBS increased. FEA displayed an increase in bone strength both in the hip (17%) and vertebrae (13%, all p < 0.0001) at anatomical sites susceptible for fragility fracture. IBN increases Scl and improves cortical and trabecular bone strength with early and ongoing vigorous suppression of bone resorption.
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Affiliation(s)
- Christian Muschitz
- Medical Department II, St. Vincent Hospital, Academic Teaching Hospital of the Medical University of Vienna, Stumpergasse 13, 1060, Vienna, Austria,
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Jung K, Lein M. Bone turnover markers in serum and urine as diagnostic, prognostic and monitoring biomarkers of bone metastasis. Biochim Biophys Acta Rev Cancer 2014; 1846:425-38. [PMID: 25220832 DOI: 10.1016/j.bbcan.2014.09.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Revised: 08/14/2014] [Accepted: 09/01/2014] [Indexed: 01/25/2023]
Abstract
Bone metastases are characterized by increased osteoblastic and/or osteolytic processes depending on the tumor type. The altogether destructive effect of metastasis formation promoted by increased metabolic activity raises the release of components from the osseous metabolism into the blood stream. These components are either enzymes directly involved in the alteration processes, metabolites/proteins that develop during this or bone matrix proteins released during this. These biomarkers are categorized in relation to their involvement in the bone formation or resorption as bone formation and resorption markers. Based on a PubMed literature search, a critical appraisal of the various biomarkers for diagnostic, prognostic, and monitoring purposes is given for patients with skeletal metastases caused by breast, prostate, lung, or renal cell carcinomas.
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Affiliation(s)
- Klaus Jung
- Department of Urology, University Hospital Charité, Berlin, Germany; Berlin Institute for Urologic Research, Berlin, Germany.
| | - Michael Lein
- Berlin Institute for Urologic Research, Berlin, Germany; Department of Urology, Sana Hospital Center, Offenbach, Germany
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